Franklin

MLA

Ker, N. R. Medieval Libraries of Great Britain: a List of Surviving Books. London: [s.n.], 1941.

APA

Ker, N. R. (1941). Medieval libraries of Great Britain: a list of surviving books. London: [s.n.].

Chicago

Ker, N. R. Medieval Libraries of Great Britain: A List of Surviving Books. London: [s.n.], 1941.